1. Product Overview
The JIKONG JK-PB1A16S15P is an intelligent Battery Management System (BMS) designed for large-capacity series lithium battery packs. It supports Li-ion, LiFePO4, and LTO battery types. This BMS integrates voltage acquisition, high-current active balancing, overcharge, over-discharge, overcurrent, and over-temperature protection, along with a coulomb meter, Bluetooth communication, and host computer monitoring functions.
The protection board utilizes energy transfer active balancing technology, capable of achieving a continuous 1A balance current. This technology ensures battery consistency, extends battery life, and delays aging. The system is compatible with mobile applications (Android and iOS) and PC software for monitoring and parameter adjustment.
1.1. Functional Characteristics
- LED Bluetooth status indicator
- APP Bluetooth remote operation
- Battery capacity calculation
- Supports PC operations
- High precision voltage acquisition (±3mV)
- High precision current acquisition
- Support information screen display
- Accurate time logging
- Support RS485 communication
- Support CAN communication
- Support heating function
- Alarm dry contact function
- Charge overcurrent protection
- Charge overvoltage protection
- Charge over temperature protection
- Low temperature protection during charge
- Discharge overcurrent protection
- Discharge undervoltage protection
- Discharge over temperature protection
- Short circuit protection
- Battery parallel current limiting function
1.2. Structural Block Diagram
2. Package Contents
The JIKONG JK-PB1A16S15P BMS package includes the following items:
- Packing Box
- BMS Main Board
- Interface Board
- Adapter
- RJ45 Network Cable (400mm)
- Switch (500mm)
- Heating Adapter Cable x1 (170mm)
- Cells Total B+ Cable x1 (500mm)
- Sampling Line A (900mm)
- Sampling Line B (900mm)
- Sampling Line C (900mm)
- Adapter Cable A (300mm)
- Adapter Cable B (300mm)
- Adapter Cable C (300mm)
- 4.3LCD-TTL-P Display (Optional, check your order)
Video 1: Unboxing and overview of the JIKONG BMS components.
3. Specifications
The JIKONG JK-PB1A16S15P BMS offers robust performance and features for various energy storage applications.
3.1. Basic Parameters
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 20-70 | V |
| Standby Power Consumption | 12 | mW |
| Operating Power Consumption | 1100 | mW |
| Operating Temperature | -30 to 70 | °C |
| Max Number of Collection Strings | 16 | S |
| Max Balancing Current | 1-2 | A |
| Max Charging Current (15P model) | 150 | A |
| Max Discharge Current (15P model) | 150 | A |
| Max Instantaneous Current (15P model) | 300 | A |
| Max Internal Loop Resistance (15P model) | 0.45 | mΩ |
| Protective Plate Size | 300*100*24 | mm |
| Finished Weight | 1000 | g |
For detailed specifications across different models (10P, 15P, 20P, 30P), please refer to the comprehensive product parameters table.
3.2. Default Parameters
The BMS comes with pre-configured default parameters for various battery types. These can be adjusted via the APP or PC software if needed.
| Parameter | Li-ion Default | LiFePO4 Default | LTO Default | Unit |
|---|---|---|---|---|
| Balancing Initial Voltage | 3 | 3 | 2 | V |
| Max Balancing Current | 1 | 1 | 1 | A |
| Unit Overcharge Voltage | 4.2 | 3.6 | 2.7 | V |
| Single Overcharge Protection Recovery | 4.17 | 3.54 | 2.64 | V |
| Monomer Undervoltage Protection | 2.82 | 2.6 | 1.8 | V |
| Single Undervoltage Protection Recovery | 2.85 | 2.65 | 1.85 | V |
| Automatic Shutdown Voltage | 2.8 | 2.5 | 1.7 | V |
| SOC-0% Voltage | 2.9 | 2.6 | 1.85 | V |
| SOC-100% Voltage | 4.18 | 3.5 | 2.65 | V |
| Trigger Balancing Differential Pressure | 0.01 | 0.01 | 0.01 | V |
| Charging Overcurrent Protection Delay | 3 | 3 | 3 | S |
| Charge Overcurrent Protection Release Time | 60 | 60 | 60 | S |
| Discharge Overcurrent Protection Delay | 300 | 300 | 300 | S |
| Discharge Overcurrent Protection Release Time | 60 | 60 | 60 | S |
| Short-circuit Protection Delay | 5 | 5 | 5 | µS |
| Short Circuit Protection Release Time | 30 | 30 | 30 | S |
| Charging Overtemperature Protection Temperature | 70 | 70 | 70 | °C |
| Charging Overtemperature Restore Temperature | 60 | 60 | 60 | °C |
| Discharge Overtemperature Protection Temperature | 70 | 70 | 70 | °C |
| Discharge Overtemperature Recovery Temperature | 60 | 60 | 60 | °C |
| Charging Low Temperature Protection Temperature | -20 | -20 | -20 | °C |
| Charge Low Temperature to Restore Temperature | -10 | -10 | -10 | °C |
| MOS Overtemperature Protection Temperature | 100 | 100 | 100 | °C |
| MOS Overtemperature Recovery Temperature | 80 | 80 | 80 | °C |
| Device Address | 0 | 0 | 0 | / |
3.3. Physical Dimensions
4. Installation and Setup
4.1. Wiring Diagrams
The JIKONG JK-PB1/2A16S-10/15/20P series protection board is suitable for 7-16 series lithium battery packs. The specific wiring method varies depending on the number of cells in your battery pack. Ensure all connections are secure and correct before powering on.
4.2. Device Activation
Before powering on the protection board, verify that the balance cables are properly connected and that the P- and B- terminals are correctly wired. Ensure the protection board is securely fixed to the battery pack. Incorrect installation can lead to malfunctions or damage.
The protection board does not have a physical power-on switch. It is designed for charging activation mode, meaning the charger voltage should be 2V higher than the battery voltage. After battery assembly, connect the charger to activate the BMS.
Alternatively, the BMS can be activated via a button (if a display screen is connected) or through the display interface itself.
4.3. Parameter Setting
Parameters such as overcharge voltage, discharge undervoltage, overcurrent, temperature limits, and balance settings can be adjusted via the mobile APP or PC software. It is crucial to read the internal parameters of the protection board first before making any changes.
4.4. Parallel Function Setup
The parallel function allows multiple BMS units to be monitored simultaneously by a host computer via an RS485 bus. To use this feature, you will need a USB to RS485 serial port cable and the JIKONG upper computer software.
The system supports up to 16 BMS units. Each BMS must have a unique address from 0 to 15. BMS with address 0 acts as the host, and addresses 1-15 are for slave units. The addresses are set using DIP switches on the interface board.
4.5. APP Installation
The mobile APP for the JIKONG BMS supports Android (version 7 minimum) and iOS operating systems. Scan the QR code below to download the APP.
5. Operation
The JIKONG BMS offers various functions to manage and protect your battery system. These functions can be monitored and controlled via the mobile APP or PC software.
5.1. Active Equalization
The BMS actively balances cells by transferring energy from higher-voltage cells to lower-voltage cells. This process is automatic when the voltage difference between any two strings exceeds a set threshold. The default balance current is 1A/2A. It is recommended that the balance current does not exceed 0.2C of the battery capacity. This function can be enabled or disabled via the BMS control page in the APP.
5.2. Display Interface
The BMS includes a reserved display interface. Users can connect an optional JIKONG display to conveniently view battery information. The display shows real-time data such as voltage, current, temperature, SOC (State of Charge), alarms, and cycle counts.
5.3. Heating Function
The BMS is equipped with a heating function to prevent battery performance degradation in low-temperature conditions. It uses a resistance heater or heating film to warm the battery. The designed heating current is 10A. Users can enable or disable this function via the APP. It is recommended to use a temperature control switch (45°C to 65°C normally closed type) in series with the heating circuit as a secondary protection.
5.4. Dry Contact Function
The BMS features two dry contacts for controlling external devices like alarms or cooling fans. When the BMS detects conditions such as over-temperature, overcharge, or over-discharge, the alarm interface can trigger a buzzer or activate a fan. Users can select up to two trigger conditions and configure them via the APP.
5.5. Protection Features
- Charge Overvoltage Protection: Prevents overcharging by shutting off charging when any cell voltage exceeds the set limit. Charging resumes when all cell voltages drop below the recovery threshold.
- Discharge Undervoltage Protection: Prevents over-discharging by shutting off discharge when any cell voltage drops below the set limit. Discharge resumes when all cell voltages rise above the recovery threshold. An automatic shutdown voltage is also configurable.
- Charge Overcurrent Protection: Protects against excessive charging current. If the charging current exceeds the set continuous current for a specified delay, charging is stopped. It resumes after a set release time.
- Discharge Overcurrent Protection: Protects against excessive discharge current. If the discharge current exceeds the set continuous current for a specified delay, discharge is stopped. It resumes after a set release time.
- Overtemperature Protection: Shuts off charging/discharging if the battery temperature exceeds the set over-temperature limit. Operation resumes when the temperature falls below the recovery threshold.
- Low Temperature Protection: Shuts off charging if the battery temperature falls below the set low-temperature limit. Charging resumes when the temperature rises above the recovery threshold. For extremely cold environments, using the heating function is recommended.
- Short Circuit Protection: Automatically protects against short circuits. Users can adjust the short-circuit protection delay and recovery time via the APP.
5.6. Emergency Switch
The emergency switch function allows the BMS to maintain charge and discharge for 30 minutes when activated via the APP, even if issues like over-temperature, over-discharge, or cell drops occur. This provides a critical window for emergency use.
5.7. Intelligent Sleep
The intelligent sleep function conserves battery energy by putting the BMS into a low-power state when it's in standby (charging/discharging current less than 1A for 26 consecutive hours). The BMS can be reactivated by pressing a button or connecting a charger.
5.8. Communication Function
The BMS supports CAN and RS485 communication. The default CAN communication rate is 250K. Users can select the appropriate protocol in the APP based on their inverter brand and specifications. Two RS485 interfaces are available: RS485-1 for communication with inverters and other settings, and RS485-2 for parallel battery pack connection and communication with the upper computer. The RS485-2 has a default baud rate of 115200. The communication address can be set via DIP switches (0-15).
5.9. Charge Current Limiting Function
The BMS includes a charge current limiting function. Users can set the continuous charging current, overcurrent delay, and release time via the APP. If the charging current exceeds the set limit, the function activates, maintaining the charging current at approximately 10A to protect the battery.
6. Troubleshooting
This section provides guidance on common issues and how to interpret BMS status indicators.
6.1. LED Indicators
The interface board features LED indicators to help diagnose the BMS status:
| Status | ON/OFF | RUN | ALM | L1-L6 | Description |
|---|---|---|---|---|---|
| Power Off | OFF | ||||
| Balance (Normal) | ON | Flicker | OFF | Battery based display | |
| Charging (Normal) | ON | Flicker | OFF | Battery based display | |
| Charging (Overcurrent, Overtemp, Overvoltage, Charging Failure) | ON | Flicker | Flicker | Battery based display | |
| Discharge (Normal) | ON | Flicker | OFF | Battery based display | |
| Discharge (Overcurrent, Overtemp, Undervoltage, Discharge Failure) | ON | Flicker | Flicker | Battery based display | |
| Other Alarms (Password not changed, Short circuit, Temperature abnormal) | ON | Flicker | Flicker | Battery based display |
Note: When the device address is set to 0 (host), the last LED indicator L6 blinks. For slave units (addresses 1-15), the LED is off and blinks after successful communication with the host. 'ON' means the LED is lit, 'OFF' means the LED is off.
6.2. Capacity Indicator LEDs
The LEDs (L1-L5) on the interface board also indicate the battery's state of charge:
| Capacity Range | Charging (L5-L1) | Discharging (L5-L1) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0-20% | OFF | OFF | OFF | OFF | ON | OFF | OFF | OFF | OFF | ON |
| 20-40% | OFF | OFF | OFF | ON | ON | OFF | OFF | OFF | ON | ON |
| 40-60% | OFF | OFF | ON | ON | ON | OFF | OFF | ON | ON | ON |
| 60-80% | OFF | ON | ON | ON | ON | OFF | ON | ON | ON | ON |
| 80-100% | ON | ON | ON | ON | ON | ON | ON | ON | ON | ON |
7. User Tips
- Always double-check all wiring connections, especially balance cables and main power connections (P- and B-), before powering on the BMS to prevent damage.
- When adjusting parameters via the APP or PC software, make small, incremental changes and monitor the battery's behavior.
- For optimal battery life, ensure the active balancing function is enabled and configured correctly for your battery type and capacity.
- In cold environments, utilize the heating function to maintain battery performance and longevity.
- Regularly check the BMS status via the APP or PC software to monitor battery health and identify any potential issues early.
- If using the parallel function, ensure each BMS has a unique address set via the DIP switches for proper communication and monitoring.
8. Warranty and Support
The JIKONG JK-PB1A16S15P BMS comes with a 3-year warranty, ensuring reliability and peace of mind for your energy storage system.
For further detailed instructions, technical diagrams, and advanced troubleshooting, please refer to the official user manual PDF available at: JIKONG BMS User Manual (PDF).
